IL139630A0 - Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data - Google Patents

Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data

Info

Publication number
IL139630A0
IL139630A0 IL13963099A IL13963099A IL139630A0 IL 139630 A0 IL139630 A0 IL 139630A0 IL 13963099 A IL13963099 A IL 13963099A IL 13963099 A IL13963099 A IL 13963099A IL 139630 A0 IL139630 A0 IL 139630A0
Authority
IL
Israel
Prior art keywords
initial carrier
symbol phase
transmitted data
phase estimates
obtaining initial
Prior art date
Application number
IL13963099A
Original Assignee
Comsat Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Comsat Corp filed Critical Comsat Corp
Publication of IL139630A0 publication Critical patent/IL139630A0/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0089—In-band signals
    • H04L2027/0091—Continuous signals

Abstract

A method and apparatus for determining initial carrier and symbol phase estimates in a burst mode digital communication system are described. In-phase and quadrature sample of a BPSK preamble are sampled to obtain correlation values. Next, sum and differences of the correlation values are obtained. Then the initial carrier phase estimate (THETAHAT) and the initial symbol phase estimate (TAUHAT) are obtained through application of an algorithm. The apparatus that implements the method consists of adders, inverters, arc tangent look-up tables and divide by 2 logic units.
IL13963099A 1998-05-13 1999-05-13 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data IL139630A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/076,762 US6075826A (en) 1998-05-13 1998-05-13 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitting data
PCT/US1999/010319 WO1999059307A1 (en) 1998-05-13 1999-05-13 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data

Publications (1)

Publication Number Publication Date
IL139630A0 true IL139630A0 (en) 2002-02-10

Family

ID=22134028

Family Applications (2)

Application Number Title Priority Date Filing Date
IL13963099A IL139630A0 (en) 1998-05-13 1999-05-13 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data
IL139630A IL139630A (en) 1998-05-13 2000-11-12 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data

Family Applications After (1)

Application Number Title Priority Date Filing Date
IL139630A IL139630A (en) 1998-05-13 2000-11-12 Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted data

Country Status (7)

Country Link
US (1) US6075826A (en)
EP (1) EP1084553B1 (en)
AT (1) ATE383704T1 (en)
CA (1) CA2331675C (en)
DE (1) DE69937951T2 (en)
IL (2) IL139630A0 (en)
WO (1) WO1999059307A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040090983A1 (en) * 1999-09-10 2004-05-13 Gehring Stephan W. Apparatus and method for managing variable-sized data slots within a time division multiple access frame
US7023833B1 (en) * 1999-09-10 2006-04-04 Pulse-Link, Inc. Baseband wireless network for isochronous communication
US8170585B2 (en) * 2007-11-14 2012-05-01 Andrew, Llc Ranging in UMTS networks
US8073463B2 (en) 2008-10-06 2011-12-06 Andrew, Llc System and method of UMTS UE location using uplink dedicated physical control channel and downlink synchronization channel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313205A (en) * 1980-07-07 1982-01-26 Communications Satellite Corporation Carrier synchronization and symbol synchronization for offset-QPSK burst communications
JP2724145B2 (en) * 1987-03-24 1998-03-09 株式会社日立製作所 Carrier regenerator
FR2615675B1 (en) * 1987-05-21 1989-06-30 Alcatel Espace METHOD FOR DEMODULATING DIGITALLY MODULATED SIGNALS AND DEVICE FOR CARRYING OUT SUCH A METHOD
US4847869A (en) * 1987-12-04 1989-07-11 Motorla, Inc. Rapid reference acquisition and phase error compensation for radio transmission of data
DE3903944A1 (en) * 1989-02-10 1990-10-11 Johannes Dr Ing Huber Symbol clock and carrier phase synchronisation method for coherent digital signal receivers with multi-dimensional signal representation
US5001727A (en) * 1989-02-15 1991-03-19 Terra Marine Engineering, Inc. Carrier and data recovery and demodulation system
US5131008A (en) * 1989-04-28 1992-07-14 Motorola, Inc. DSP-based GMSK coherent detector
CA2018855C (en) * 1989-06-14 1993-09-21 Shousei Yoshida Burst demodulator for establishing carrier and clock timing from a sequence of alternating symbols
US5214674A (en) * 1991-01-25 1993-05-25 Comsat Method and apparatus for carrier synchronization acquisition in a digital burst mode communication system
US5272446A (en) * 1991-11-29 1993-12-21 Comsat Digitally implemented fast frequency estimator/demodulator for low bit rate maritime and mobile data communications without the use of an acquisition preamble

Also Published As

Publication number Publication date
CA2331675C (en) 2004-07-27
DE69937951D1 (en) 2008-02-21
WO1999059307A8 (en) 2000-01-27
CA2331675A1 (en) 1999-11-18
IL139630A (en) 2009-08-03
EP1084553A1 (en) 2001-03-21
US6075826A (en) 2000-06-13
EP1084553A4 (en) 2005-06-08
WO1999059307A1 (en) 1999-11-18
DE69937951T2 (en) 2009-01-02
ATE383704T1 (en) 2008-01-15
EP1084553B1 (en) 2008-01-09

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